How to attach a Bump Node to a Node setup containing many shaders in Cycles?
The shaders for which a normal input makes sense usually do have a normal input.
You can plug the output of a node into any number of node inputs.
Example :

Or you can simply use a displacement node and connect it into the displacement input of the &quot;Material Output&quot; node :

It's hard to get exactly the same result using these two methods. The benefit of the first one is that you can define different bump maps for each type of shader.